PPG PRK eprom data 

 This folder contains the dumps 
  of the card eproms used in the PPg PRK keyboard .
  there are seven cards in all , each contains sample data
  for the different voices .
  some voices may take up part of  or a whole card .
 Eproms used are Hitachi 27128 eproms 
  part number hn4827128g-30
  
 Each card has a 74ls138 address decoder on it as well.
  each card may have up to seven eproms on it .


 First card has string sounds on it and also some program data .
  the eproms are marked [ from left to right ]
  
  0  1  2  3  4  5  p
  s  s  s  s  s  s  s
  
 The bin files are called;-
  prkso      =>    s0 eprom data 
  prks1      =>    s1 eprom data 
  prks2      =>    s2 eprom data 
  etc
  
  prkps      =>    ps eprom data [ program/ control ]  
  
  
 Card number 2 has six eproms on it      [Piano ]
  0  1  2  3  4  5    
  G  G  G  G  G  G  
  
  
 Card number 3 has six eproms on it      [Piano ]  
  6  7  8  9  A  B
  G  G  G  G  G  G  
  
 Card number 4 has six eproms on it      [multiple sounds ]
  0  1  2  3  4  5
  M  M  M  M  M  M  
  
  
 Card number 5 has six eproms on it     [ multiple sounds ]
  6  7  8  9  A  B
  M  M  M  M  M  M  
  
  
 Card number 6 has six eproms on it      [marimba ]
  0  1  2  3  4  5  
  M  M  M  M  M  M
  
 Card number 7 has six eproms on it     [ rhodes ]
  0  1  2  3  4  5  
  R  R  R  R  R  R
  
 Care is needed as some of the eeproms are marked the similar , but have different functions.
 

Peter Blackett, Feb 2001 
 
